Videomaker – Learn video production and editing, camera reviews › Forums › General › Video and Film Discussion › H.264 Compression??
I don’t think any programs edit H.264, but I could be wrong.
I noticed in FCP (which I know you’re not using) you can create a custom set up for your timeline. It doesn’t have h.264 as an option, but it allows for square pixel aspect ratio and 640X480 editing.
Maybe that would work, I never tried it.